JPS5564661A - Self-compensator for magnetic disk memory unit - Google Patents

Self-compensator for magnetic disk memory unit

Info

Publication number
JPS5564661A
JPS5564661A JP13665478A JP13665478A JPS5564661A JP S5564661 A JPS5564661 A JP S5564661A JP 13665478 A JP13665478 A JP 13665478A JP 13665478 A JP13665478 A JP 13665478A JP S5564661 A JPS5564661 A JP S5564661A
Authority
JP
Japan
Prior art keywords
speed
head
signal
memory unit
detector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13665478A
Other languages
Japanese (ja)
Inventor
Yasuyoshi Oda
Hiromi Hamaoka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13665478A priority Critical patent/JPS5564661A/en
Priority to US06/090,123 priority patent/US4331987A/en
Publication of JPS5564661A publication Critical patent/JPS5564661A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
    • G11B5/55—Track change, selection or acquisition by displacement of the head
    • G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
    • G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
    • G11B5/553—Details

Landscapes

  • Moving Of Head For Track Selection And Changing (AREA)
  • Feedback Control In General (AREA)

Abstract

PURPOSE: To improve the manufacture efficiency of a memory unit by automatically compensating the characteristic dispersion of a detector by measuring characteristics of a head-moving speed detector by using the memory unit and then by adjusting a compensator in accordance with the result of the measurement.
CONSTITUTION: Data are written on or read from a track on disk 100 by reciprocating heads 140 and 150 by actuator 280 in a direction crossing the track. On each fixed-distance movement of each head, increment position detector 200 generates a pulse and speed detector 230 generates a head speed signal to generate 250 a speed error signal corresponding to the speed signal and speed command signal compensated 240 and 260 in response to the speed signal. The actuator is driven responding to this error signal, the head is moved at a constant speed by the speed command signal, and the speed of the head is measured by the increment position detection pulse to adjust compensators 240 and 260.
COPYRIGHT: (C)1980,JPO&Japio
JP13665478A 1978-11-08 1978-11-08 Self-compensator for magnetic disk memory unit Pending JPS5564661A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP13665478A JPS5564661A (en) 1978-11-08 1978-11-08 Self-compensator for magnetic disk memory unit
US06/090,123 US4331987A (en) 1978-11-08 1979-11-01 Self-compensating device for a magnetic disc apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13665478A JPS5564661A (en) 1978-11-08 1978-11-08 Self-compensator for magnetic disk memory unit

Publications (1)

Publication Number Publication Date
JPS5564661A true JPS5564661A (en) 1980-05-15

Family

ID=15180376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13665478A Pending JPS5564661A (en) 1978-11-08 1978-11-08 Self-compensator for magnetic disk memory unit

Country Status (2)

Country Link
US (1) US4331987A (en)
JP (1) JPS5564661A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59167882A (en) * 1982-12-14 1984-09-21 ストレ−ジ・テクノロジ−・コ−ポレ−シヨン Apparatus and method for automatically calibrating speed of magnetic disc driver
JPS60106082A (en) * 1983-11-14 1985-06-11 Nec Corp Magnetic disk device
JPS6133275U (en) * 1984-07-30 1986-02-28 パイオニア株式会社 track access device
JPS63152067A (en) * 1986-12-16 1988-06-24 Fujitsu Ltd Seek control system for magnetic disk device
US5731973A (en) * 1995-01-06 1998-03-24 Fujitsu Limited Developing system and measuring system for filing apparatus

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4462053A (en) * 1981-07-02 1984-07-24 Irwin International, Inc. Method for controlling a disc head
US4516178A (en) * 1982-09-15 1985-05-07 Ampex Corporation Cylinder crossing detection circuit for disc drive or the like
JPS6139239A (en) * 1984-07-28 1986-02-25 Sony Corp Optical disc player
US4772964A (en) * 1985-11-30 1988-09-20 Kabushiki Kaisha Toshiba Recorded data reproducing apparatus capable of performing auto-gain adjustment
JPS6337815A (en) * 1986-07-30 1988-02-18 Toshiba Corp Recorded data reproducing device
US4914644A (en) * 1988-09-26 1990-04-03 International Business Machines Corporation Disk file digital servo control system with coil current modeling
JP2613937B2 (en) * 1989-01-30 1997-05-28 富士通株式会社 Servo circuit
JPH02267781A (en) * 1989-04-07 1990-11-01 Matsushita Electric Ind Co Ltd Method for correcting load in retrieval controller
JPH02306479A (en) * 1989-05-19 1990-12-19 Tokico Ltd Magnetic disk controller
JPH03178082A (en) * 1989-12-07 1991-08-02 Matsushita Electric Ind Co Ltd Data transducer positioning device
US5189571A (en) * 1990-04-30 1993-02-23 Seagate Technology, Inc. Adaptive settle time minimization for a hard disk drive
JP2634489B2 (en) * 1990-12-21 1997-07-23 富士通株式会社 Magnetic disk drive
US5329409A (en) * 1991-07-24 1994-07-12 Seagate Technology, Inc. Correction of current feedback offset for disc drive servo systems

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699555A (en) * 1970-10-23 1972-10-17 Zerox Corp Apparatus for rapid action displacement control
GB1396834A (en) * 1973-01-31 1975-06-04 Ibm Data storage apparatus
US3924268A (en) * 1974-08-05 1975-12-02 Ibm High density track follower control system for magnetic disk file
US3947881A (en) * 1975-04-21 1976-03-30 Control Data Corporation Servo positioning error control for magnetic disk file
GB1503971A (en) * 1975-05-15 1978-03-15 Ibm Positioning system for data storage apparatus
GB1499268A (en) * 1976-06-30 1978-01-25 Ibm Servo apparatus
US4096579A (en) * 1977-02-28 1978-06-20 Xerox Corporation Velocity control apparatus for disk drive
US4096534A (en) * 1977-04-12 1978-06-20 International Business Machines Corporation Track accessing circuitry for a disk file with switchable filter
US4133011A (en) * 1977-12-23 1979-01-02 International Business Machines Corporation Sampled data positioning system employing a model of the physical system for time optimal control
JPS54119215A (en) * 1978-03-09 1979-09-17 Toshiba Corp Magnetic disc apparatus

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59167882A (en) * 1982-12-14 1984-09-21 ストレ−ジ・テクノロジ−・コ−ポレ−シヨン Apparatus and method for automatically calibrating speed of magnetic disc driver
JPS60106082A (en) * 1983-11-14 1985-06-11 Nec Corp Magnetic disk device
JPH0316713B2 (en) * 1983-11-14 1991-03-06 Nippon Electric Co
JPS6133275U (en) * 1984-07-30 1986-02-28 パイオニア株式会社 track access device
JPS63152067A (en) * 1986-12-16 1988-06-24 Fujitsu Ltd Seek control system for magnetic disk device
US5731973A (en) * 1995-01-06 1998-03-24 Fujitsu Limited Developing system and measuring system for filing apparatus

Also Published As

Publication number Publication date
US4331987A (en) 1982-05-25

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